Typewriting machine



L. S. BARR.

TYPEWRITING MACHINE.

APPLICATION FILED 'FEB. 28, 1922.

L43QA22 Patented Nov. 7, 1922'.

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Without actuating the ribbon vibrator.

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entries w lid TYIEWRITING MACHINE.

' iipplication filed February 28, 1922. Serial No. 539,885.

I '0 all wh'om'it'may concern:

Be it known that I, Lnsrnn STEWART BARR, a citizen of the United States, residing at Washington, District of Columbia, have invented certain new and useful Improvements in Typewriting Machines, "of which the following is a specification. I

This invention relates to typewriting machinesend more particularly to a check protecting device for typewriters.

. The object of the invention is to provide, in any standard make of typewriter, a separate type bar and key'lever for n'iaking a se ries of non-inked indentations upon more or less of the writing on a sheet ffor the purpose of preventing alterations therein.

To this end, the invention comprises a type bar having means for indenting a paper, such as a check, and constantly effective means for operating the type bar and actuating the letter-feed ratchet mechanihBm y providing a separate key lever for this purpose, which will automatically cut out the ribbon vibrator while actuating the letterfeed ratchet, the operator of, a machine in which the invention is applied Inerely has to manipulate a particular key lever in order to produce the required indentations. Some machines are already equipped with a ribbon cut out for the purpose of rendering the ribbon vibratorinoperative when making stencils, and with such machines it is possible to produce non-inked indentations on a bank check, but with such machines the operator would have to manipulate the ribbon cut out prior to operating the particular key lever used; and this would require the operators attention as well as time. With a machine having my invention applied thereto, on the other hand, the operator merely has to manipulate a particular key lever without having his attention distracted and time consumed by the necessity of performing an antecedent operation.

Referring to the accompanying drawings for a specific disclosure of one embodiment of my invention:

Figure 1 is a vertical sectional view of a typewriting machine having my invention applied thereto, and

Figure 2is a detail view showing a face employedfor making the indentations. 7 Numeral i on the drawing designates the base of the typewriter. Corner posts 2 rise dogs which alternately engage the "teeth of the ratchet bar and permit a step-by-step movement-of the platen carriage under the action of its impelling spring, as well understood in the art.

A universal-bar frame 8 is pivoted about the axis 9 and has a centrally projecting arm 10, the rear end of which is connected by a rod 11 with the horizontal arm or dog lever 7. Attached to an intermediate point of arm 10 is a rod 12 which is connected with the operating mechanism of the ribbon vibrator.

A key lever 13 is fulcrumed on plate 1% and is resiliently held in normal position by a spring 15. Sub lever 16 is pivotally connected with the kc-ylever and has its lower slotted end working on a fulcrum rod 17 while the upper end thereof has a link con nection 18 with a type bar 19.

The construction and operation of the aforementioned parts are well understood by those. skilled in the art, and further description thereof is supererogatory.

My invention, as heretofore indicated, comprises a special type bar for indenting papers such as, wills, bank checks, etc, and means for operating this type bar and actusting the letter feed without actuating the ribbon vibrator, for the purpose of producing non-inked indentations in a facile mannor.

in a typewriter, the ribbon vibrator and letter-feed ratchet are connected with the universal bar and the latter is actuated on depression of each key lever or type bar. In

order, therefore, to provide a key lever which is constantly effective to actuate the letter feed and not actuate the ribbon ibrator, it

lever or 6 bar so that it will not actuate 7 I the universal bar and then provide an independent connection between the key lever, or

- type bar, and the letter-feed ratchet, or

said hey lever. The first mentioned construction is,

np; out i is necessary either (1) -to construct the key i one which simplest .in practice, and is the prefer to use. p

For carrying out this construction in the particular make "of typewriter chosen for illustration, I provide aslot, or notch, 20,-

perhaps,-"thp in; the under side of the particular key lever tween sai mal operation of dog lever 7 by the universal bar isnot interfered with by the independent 13 which controls the check-indenting type bar 19, locating the. slot in registry .withthe universal bar, so that the,;l 'atte1' will not be affected by depression of the key lever; and. further grovide' a one-way connection beratchet. his one-way connection may be conveniently constituted by a rod 21 having its upper endpivoted to" the horizontal arm of dog lever 7. and having its lower end engaged in a notchon the under side of the key leper. As' shown, the upper end of connect- .ing rod 11 works in a slot-in the outer end;

of the horizontal arm of dog lever 7. In this construction, it is obvious that the norconnection 21, while the operati'bn of dog lever 7- by independent connection 21 has no effect on the'univers'al bar and ribbon vibrator; It is apparent, therefore, that key lever 13 is constantly effective to produce. non-inked indentations, and that its conthree vertically nections interfere in no way with the operation of the universal bar connections by the other key levers. i

Figure 2'illustrates a, type block which may be employed for making the indenta-- tions. As indicated, this block will make alined and substantially round indentations for each actuation-flof the check-protector keylever Of course any desired number of indentations, ."01 form thereoflmay be employed without departing from my invention.

While, for the purpose of illustration, I." have shown myinvention applied to a par.

ticular make of typewriter, it is clear thatthe invention may be applied to typewriters of different constructions by modifying the I connections shown to suit the particular t pewi'iter, such modifications being within the skill of the mechanic skilled in the typewriter art.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is l I 1. The combination with a typewriter having a letter-feed ratchet, a ribbon vibrator, and theusual key. levers adapted when actuated to operate both the'ratchet and vibrator of a separate lever, a type bar operably' connected therewith havingv means for indenting a paper, and means ',.controlled bygsaid 'separatekeylever for acmating the letter-feedratchet withoutam tuatlfig theribhon vibrator. r 4

2. The combination with 'a typewriter having a letter-feed ratchet, a ribbon vikey lever and the letter-feed .brator,' and the usual key levers adapted -when. actuated to operate both theratchet and vibrator; of a separate key lever and a type bar operably connected therewith hav- 111g means for indenting'a paper, and means operated .on depression'of said separate key lever. for actuating the letter-feed ratchet and not the ribbon vibrator.

3. Thecombination with a typewriter having a letter-feed ratchet and a ribbon vibrator, and the usual key levers adapted when actuated to operate both the ratchet and-vibrator; of a separate key lever and a type bar operably connected therewith having means for indenting a paper, and'constantly efi'ective means operated on depresmeans for operating said type bar'and letter-feed" ratchet Without actuating the uni versal bar,

6. The combination with a typewriter having key levers, universal bar, letter-feed ratchet-and ribbon vibrator; of a type bar having meansfor indenting a paper, and 'means independent of the universal bar for operating said'type bar and the letter-feed ratchet. i

7. The -combination .with a typewriter having key,. l evers, universal bar, letter-feed: ratchet and-ribbon vibrator; of a type bar having means for indenting a paper, a key shaving means for indenting'a paper, and.

lever ineffective on the universal bar, and

a one-.way connection between said key lever and the letter-feed ratchet.-'

8. The 'Qmbination with a typewriter having key levers, universal bar, letter-feed ratchet and ribbon vibrator; of a key lever,

a type bar connected therewith and having means-for indenting a paper, a one-way. zconnection between said :key lever and the letter-feed ratchetv mechanism actuatin said 'ratchet mechanism on; depression 0 key lever but permitting said ratchet mechasaid nism' to be operated the universal bar jwithout'movin said ey lever, said key lever being'in'e ective on said universal bar. .9. he typewriter having keylevers, universal bar, lettenfeed ratchet and ribbon vibrator, a type bar having means for indenting a paper and constantly efiective tab means for operating said type Year and letterfeed ratchet without ac-mating the ribbon vibrator.

10. In a typewriter having key levers, universal bar, lettenfeedl ratchet and ribhon vibrator, a. type her having means for indenting'a paper, and means for operating said type bet and letter-feed ratchet with out actuating the universal bar, said means having a one-way connection with the 10 ratchet.

In testinwny whereof I hereunto affix my signature.

LESTER STEWART BARR 

